#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <arpa/inet.h>

int main(int argc, const char* argv[])
{
    int fd = socket(AF_INET, SOCK_DGRAM, 0);
    if(fd == -1)
    {
	perror("socket error");
	exit(1);
    }

    //绑定ip和端口
    struct sockaddr_in client;
    memset(&client, 0, sizeof(client));
    client.sin_family = AF_INET;
    client.sin_port = htons(6767);
    inet_pton(AF_INET, "0.0.0.0", &client.sin_addr.s_addr);
    int ret = bind(fd, (struct sockaddr*)&client, sizeof(client));
    if(ret == -1)
    {
	perror("bind error");
	exit(1);
    }

    //接收数据
    while(1)
    {
	char buf[1024] = {0};
	int len = recvfrom(fd, buf, sizeof(buf), 0, NULL, NULL);
	if(len == -1)
	{
	    perror("recvfrom error");
	    break;
	}

	printf("client == recv buf:%s\n", buf);
    }

    close(fd);

    return 0;
}
